[Dingfodgy]

For about $50 you can get the inner rocker with a 3" floor extension and for about 20 bucks more you can get the outer rocker. So for less then $100 per side you can have your "rusted" cab back in original shape.
Most of us spend $500-$700 to get our cabs back in shape, plus the hours and hours of welding, grinding and finishing required. Consider yourself lucky.....especially for 850 dollars!
I know it's Arizona and any rust is kind of unusual, but really it's not that bad.